Use Case:  Set M10 Tilt Angles

Description:  Send correction to M10 tilt axis

Role(s)/Actor(s): 
Primary: Maintenance
Secondary: M10

Priority: Major

Performance: TDB

Frequency: During optical alignment for lateral pupil positioning.

Package Assignment:  M10 Subsystem.

Preconditions: 

• M10 is ONLINE

Basic Course: 

• Send command SETTILT <alpha,beta> to tilt M10 with given tilt angles (alpha,beta)
  Exception Course: Command failed
• ATCS sends tilt angles to M10

  Interface:  IfM10.Tilting.SetAbs,  IfM10.Tilting.SetRel

  Exception Course: Tilt angles too big
  Exception Course: Command failed
• ATCS returns OK reply

Exception Course: Tilt angles too big

• The tilt angles are too big and would send M10 to limit
  Tilt angle out of range (|tilt| < 90 arcsec in each direction)
  Ignore correction
  ATCS returns OK reply
  
  

Exception Course: Command failed

• ATCS returns ERROR reply

Postconditions: 

• M10 is tilted to the given angles.

Issues to be Determined or Resolved: 

Notes:

Last modified: Fri Nov 23 11:59:30 UTC 2001